Rotary kiln.



PATENTED MAR. 19, 1907.

W. R. WARREN.

ROTARY KILN.

APPLICATION FILED 00131. 1905.

INVENTOR Z/z'Z/z'am 7?. Zlfzrrm WITNESSES:

heating-surface than is possible in a single tion along as a; Fig. 1.

WILLIAM R. WARREN,

OF NEW YORK, N. Y.

ROTARY KILN.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed October 31, 1905. Serial No. 285,308.

To all whom it may concern.-

Be it known that I, WILLIAM R. WARREN, a citizen of the United States,residing at Manhattan borough, in the county of New York and State ofNew York, have invented new and useful Im rovements in Rotary Kilns, ofwhich the Following is a specification.

This invention relates to a rotary kiln consisting of an outer shellwith one or more inner shells placed concentrically or eccentrically inrelation to the outer shell of relative size, to be determined as maybest suit the particular material to be treated, such inner shell orshells extending through a part or the whole of the length of the outershell, the object being to divide the material which enters the kiln,and thus producing a larger outer shell, as at present in use, saidshells being all made to. receive the material to be treated.

This invention is set forth in the following specification and claimsand illustrated in the annexed drawing, in which Figure 1 is a sectionalside view of a kiln embodying this invention. Fig. 2 is a sec- In thedrawing is shown a kiln comprising a shell or outer cylinder a. One ormore inner cylinders are located in the outer shell. Inner cylinders areshown at b and c. I

Supports are shown at d in form of radial ribs or struts. One or morelinings of firebrick can be provided. The inner cylinders are made ofmetal or some suitable refractory material The inner cylinders canextend the whole gr only part of the length of the outer cyliner. 1 Thematerial to be treated, such as ce- 1 ment, is divided or scattersitself through the various cylinders or shells, and increasedheating-surface or division of material under treatment results withquick and thorough operation.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A rotary kiln comprising outer and inner shells, all said shellsbeing adapted to receive material to be treated so as to allow the sameto be subdivided and rapidly heated said shells being made to feed thematerial in one direction while the heat or flame is made to travel inthe opposite direction 2. A rotary kiln comprising outer and innershells, the latter being extended part of the length of the outer shelland all the shells being made to receive material so as to subdivide thesame said shells being made to feed the material in one direction whilethe heat or flame is made to travel in the opposite direction.

3. A rotary kiln comprising outer and inner shells placed concentricallyto one another and all made to receive material forsubdividing andrapidly heating the same said shells belng made to feed the material inonedirection while the heat or flame is made to travel in the oppositedirection.

4. A rotary kiln comprising an outer shell of imperforate material andshells concentrically arranged within said outer shell and all made toreceive material for subdividing and rapidly heating the same.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM R. WARREN. Witnesses:

C. L. FURBUsH, F. W. WHITE.

